I'm curious about this. I notice this sentiment on any topic where someone quit somebody else's drug of choice.
Someone says they improved their life by dropping weed, the responses will be full of people telling you that alcohol is legal poison (nevermind that nobody was talking about alcohol) and weed is a miracle drug, and they are perfectly high functioning thank you very much.
Someone says they improved their life by dropping booze, everyone has to tell them how nobody lives forever, and didn't you see that study that says moderate drinking is healthy?
And so on for all the other substances people consume.
Its like a lot of people secretly feel like they have to justify their own usage whenever someone does something differently, as if they feel attacked for some reason. But you don't have to. You can put whatever you want in your body for whatever reason you choose. And if other people choose not to (and maybe even choose to write about it), why should that be a bother to you?